The golden ratio is ubiquitous in math, science, art, and nature. This challenge is concerned with the number itself, which is 1.618033988 to 10 significant digits. Implement a function that calculates the golden ratio to 100 significant digits using only integers, strings and basic arithmetic operations: +, -, *, //

Examples

golden_ratio() ➞ 1.618033988+90 more decimal places

Notes

This function has no argument so naturally there is only one test case.